| Parameter |
Value |
| Designation |
P/2022 R5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-05-27T20:48:27.054720Z |
| Orbit solution date (soln_date, UTC) |
2022-11-29T21:43:49Z |
| Obs used |
47 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-08T14:25:00.393600Z |
| Discovery magnitude (MPC) |
21.35 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-13.0000000 |
| e |
0.19578965 |
| q (au) |
2.469627 |
| a (au) |
3.070872 |
| i (deg) |
15.291928 |
| Ω (om, deg) |
115.067048 |
| ω (w, deg) |
240.680778 |
| M (ma, deg) |
25.299334 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.907 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.907 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.559 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
16:17:24.51 |
-13:36:18.0 |
HIP 79852 |
12.88 |
| 2026-09-20 12:00 |
16:17:56.27 |
-13:39:47.9 |
HIP 79852 |
13.15 |
| 2026-09-21 00:00 |
16:18:28.23 |
-13:43:17.3 |
HIP 79852 |
17.99 |
| 2026-09-21 12:00 |
16:19:00.37 |
-13:46:46.2 |
HIP 80048 |
20.48 |
| 2026-09-22 00:00 |
16:19:32.71 |
-13:50:14.7 |
HIP 80048 |
15.04 |
| 2026-09-22 12:00 |
16:20:05.24 |
-13:53:42.6 |
HIP 80048 |
13.41 |
| 2026-09-23 00:00 |
16:20:37.96 |
-13:57:10.1 |
HIP 80048 |
16.81 |
| 2026-09-23 12:00 |
16:21:10.87 |
-14:00:37.1 |
HIP 80048 |
23.16 |
| 2026-09-24 00:00 |
16:21:43.96 |
-14:04:03.6 |
HIP 80282 |
23.54 |
| 2026-09-24 12:00 |
16:22:17.24 |
-14:07:29.6 |
HIP 80282 |
17.27 |
| 2026-09-25 00:00 |
16:22:50.71 |
-14:10:55.0 |
HIP 80282 |
13.98 |
| 2026-09-25 12:00 |
16:23:24.36 |
-14:14:20.0 |
HIP 80282 |
15.74 |
| 2026-09-26 00:00 |
16:23:58.20 |
-14:17:44.3 |
HIP 80282 |
21.38 |
| 2026-09-26 12:00 |
16:24:32.22 |
-14:21:08.2 |
HIP 80505 |
25.81 |
| 2026-09-27 00:00 |
16:25:06.42 |
-14:24:31.5 |
HIP 80505 |
21.86 |
| 2026-09-27 12:00 |
16:25:40.80 |
-14:27:54.3 |
HIP 80505 |
21.19 |
| 2026-09-28 00:00 |
16:26:15.36 |
-14:31:16.5 |
HIP 80505 |
24.11 |
| 2026-09-28 12:00 |
16:26:50.10 |
-14:34:38.1 |
HIP 80505 |
29.62 |
| 2026-09-29 00:00 |
16:27:25.02 |
-14:37:59.2 |
HIP 80793 |
34.68 |
| 2026-09-29 12:00 |
16:28:00.11 |
-14:41:19.7 |
HIP 80793 |
27.13 |
| 2026-09-30 00:00 |
16:28:35.38 |
-14:44:39.6 |
HIP 80793 |
20.83 |
| 2026-09-30 12:00 |
16:29:10.83 |
-14:47:58.9 |
HIP 80817 |
17.20 |
| 2026-10-01 00:00 |
16:29:46.46 |
-14:51:17.6 |
HIP 80817 |
13.21 |
| 2026-10-01 12:00 |
16:30:22.26 |
-14:54:35.7 |
HIP 80817 |
14.95 |
| 2026-10-02 00:00 |
16:30:58.23 |
-14:57:53.2 |
HIP 80817 |
21.09 |
| 2026-10-02 12:00 |
16:31:34.38 |
-15:01:10.1 |
HIP 80817 |
28.98 |
| 2026-10-03 00:00 |
16:32:10.69 |
-15:04:26.4 |
HIP 80817 |
37.56 |
| 2026-10-03 12:00 |
16:32:47.18 |
-15:07:42.0 |
HIP 81117 |
30.00 |
| 2026-10-04 00:00 |
16:33:23.85 |
-15:10:57.0 |
HIP 81117 |
22.65 |
| 2026-10-04 12:00 |
16:34:00.68 |
-15:14:11.3 |
HIP 81117 |
17.44 |
| 2026-10-05 00:00 |
16:34:37.68 |
-15:17:25.0 |
HIP 81117 |
16.58 |
| 2026-10-05 12:00 |
16:35:14.85 |
-15:20:38.1 |
HIP 81294 |
17.77 |
| 2026-10-06 00:00 |
16:35:52.19 |
-15:23:50.4 |
HIP 81294 |
14.68 |
| 2026-10-06 12:00 |
16:36:29.69 |
-15:27:02.1 |
HIP 81373 |
13.27 |
| 2026-10-07 00:00 |
16:37:07.36 |
-15:30:13.1 |
HIP 81373 |
6.44 |
| 2026-10-07 12:00 |
16:37:45.20 |
-15:33:23.5 |
HIP 81373 |
9.62 |
| 2026-10-08 00:00 |
16:38:23.20 |
-15:36:33.1 |
HIP 81373 |
18.20 |
| 2026-10-08 12:00 |
16:39:01.37 |
-15:39:42.0 |
HIP 81631 |
21.86 |
| 2026-10-09 00:00 |
16:39:39.70 |
-15:42:50.2 |
HIP 81631 |
13.10 |
| 2026-10-09 12:00 |
16:40:18.19 |
-15:45:57.7 |
HIP 81631 |
7.39 |
| 2026-10-10 00:00 |
16:40:56.84 |
-15:49:04.5 |
HIP 81631 |
11.36 |
| 2026-10-10 12:00 |
16:41:35.66 |
-15:52:10.6 |
HIP 81631 |
19.92 |
| 2026-10-11 00:00 |
16:42:14.63 |
-15:55:15.9 |
HIP 81745 |
27.23 |